Harish Palaniappan's

If you have an aquarium at home and sometimes bothered about having proper guidance in maintaining it, or bringing down the fish death rate for months... then this website below should be of good help.

http://www.firsttankguide.net

if you need more help, books seem the best.. because its not so common to find people who can guide with scientific info on aquariums.. evens vets only seem to choose to specialize in larger animals in India, rather than fish that too decorative fish..

Update 30 July 07

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Breeding and maintaining fish, is an art.. and there are may be two ways of doing this.
Either you select different kinds of decorative fish (which are compatible with one another of course), and breed them in the same tank. or,

Just select a specific type of fish that comes in many 100 colors and varities like chichilds, and discus fishes... and rear different types and colors of them in the same tank. This will help in lesser maintenance and you don't have to worry much about fish incompatibles or fighting over different species in the interest of dominating their space in your tank.

If you select the first type of tank, where you breed different species of them in the same tank, then you need to find an informative fish shop dealer who can tell you which fish is incompatible with which others, so you don't have to protect your fishes from fighting with each other. Also some reading might be neccessary.

Fish of the same kind doesn't mean they won't fight.. Regarding fighting and incompatibles, you actually should read books, search information, ask people or shopkeepers, and importantly have one or two tank divider slates or slides for stopping them fight until you find out a remedy.

To understand how interesting and important fish breeding could get, read this post about somebody's oscar fish fighting with its partner.

Some good sites:
http://www.elmersaquarium.com/:
This site has good amount of information on fish types, fish compatibilities, and importantly covers all the common aquarium problems with quick solutions.
Click on 'Site Guide' link on the homepage of this site to see its index of resources.

It has an online aquarium manual too. here

It has an interesting guide on a variety of fishes here.

fish-tank-guide.com has a list of fish types and some notes on it.. good for a quick read. (scroll to the bottom of page in the link)..

For books, you could search up the appropriate books from amazon or the FishBookStore.com

More links:
http://www.aquariumfish.net
http://www.petfishtalk.com
Aquarium mainenance - Do it yourself homemade filters, sumps, kits